|Pos|Country:|Gold:|Silver:|Bronze:|Total:|
|---|---|---|---|---|---|
|1|Italy (ITA)|3|3|1|7|
|2|United States (USA)|3|0|1|4|
|3|Poland (POL)|1|3|3|7|
|4|Soviet Union (URS)|1|2|2|5|
|5|Hungary (HUN)|1|0|0|1|
|5|Czechoslovakia (TCH)|1|0|1|2|
|7|Ghana (GHA)|0|1|0|1|
|7|South Africa (RSA)|0|1|1|2|
|9|Great Britain (GBR)|0|0|3|3|
|10|Australia (AUS)|0|0|2|2|
|11|Japan (JPN)|0|0|1|1|
|11|United Arab Republic (EGY)|0|0|1|1|
|11|Finland (FIN)|0|0|1|1|
|11|Argentina (ARG)|0|0|1|1|
|11|Romania (ROU)|0|0|1|1|
|11|Germany (EUA)|0|0|1|1|

Question: how many more silvers did italy win compared to the united states?
Answer: 3